urbosmart race port blow-off valves are designed for use on large-capacity turbocharger systems and high-horsepower engines. These are the largest and highest-flowing BOVs in the Turbosmart lineup. Featuring a unique collar design, small size, and lightweight construction, Turbosmart race port blow-off valves provide greater performance through faster turbo spool-up from idle, along with reduced turbo lag between gears. Turbosmart race port BOVs are ideal for circuit and drag vehicles and trucks.